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Day 12- Tadashi Seduces Hiro For Once

Summary:

Hiro and Tadashi are sharing a tent while camping when Tadashi gets a very awkward erection and decides to make the best of the opportunity

Notes:

In which Hiro is 12 and Tadashi is 17. People were disappointed that I removed the camping prompt from the list of Hidashi month prompts. So I decided to do a camping setting for this fic.

(See the end of the work for more notes.)

Work Text:

"Alright, boys. I'm turning in. All that driving earlier wore me out!"

Aunt Cass smiled and rose from her log across the fireplace from her two nephews. The family had just finished s'mores on the first night of their three-day weekend camping trip. Cass had driven them the five hours from San-Fransokyo to the woods and set up her own tent and the separate one the bros would share.

Because of this, she was clearly exhausted. But not wanting to disappoint the boys, she'd stayed through to dinner.

Hiro smiled and waved from his log by Tadashi.

"G'night, Aunt Cass!" He called. Tadashi smiled too and nodded.

Cass stretched and yawned.

"Ahhh! Remind me to call Mira to see how Mochi is doing. He's still just a kitten to me, even after two years."

And with that, she trudged over to her own tent and crawled inside. A minute later her light went out. She knew she could trust Tadashi to manage Hiro and the fire. After all, he still had a whole year of school left and already he had scholarships lined up for SFIT!

"Soooo…" Hiro looked up at his big brother. "What now?"

He was worried Tadashi had forgotten that they said he could stay up until 11, and it was only 10:30. But Tadashi smiled down at him as warmly as the campfire before then and jerked his head over at a clearing in the woods about twenty yards away, barely lit by a waxing moon. In the clearing was a picnic bench.

"I'll put out the fire, then we'll go see if we can see any meteors. I know the shower doesn't technically start until tomorrow afternoon, but we might see a couple of early birds."

Hiro beamed and waited happily as Tadashi doused the fire with a water bucket. Then the older boy snatched up a flashlight and a can of Bear Spray, the latter of which he clipped to a belt loop. Tadashi held out his hand for his otōto.

Hiro took it and rose from his stump. Tadashi turned on the flashlight and began to guide them over to the table in the clearing. Halfway there Hiro started shivering.

Tadashi chuckled. "You're going to have to start wearing a jacket everywhere, you know. Here, I'll warm you up."

Tadashi sat on the tabletop of the bench, his feet on the seat. He spread his legs and let Hiro nestle in between them. Tadashi leaned down and hugged Hiro's shoulders, squeezing the kid's sides with his knees as he did so. Tadashi was perfectly content like this.

Then Hiro leaned his head back and rested against his brother's groin. The pressure there was insistent.

Tadashi tried to ignore it, it just felt weird. He turned his eyes up to the sky. "Tell me if you see any."

He almost could have forgotten about it. But Hiro couldn't stay still for five seconds. He was always turning his head to look at something else, or wriggling for seemingly no reason.

"You've got a lot of energy tonight," Tadashi noted. "Are you going to be able to sleep?"

"W-we'll see!" Hiro said in a high voice that made Tadashi realize the kid was trying not to shiver. He probably knew Tadashi would make them turn in early if he thought Hiro was too cold, and was trying to stay strong. Tadashi would keep an eye on things, but for now he'd let Hiro stay out.

They made it about seven more minutes. In fact, Hiro did fine. After the second minute he tucked his arms into his sleeves and seemed to have no more trouble. It was Tadashi who had to tap out.

Hiro shifted exactly the wrong way to point out, at last, a shooting star. It was directly overhead and left an almost key-lime pie green streak in the sky behind it.

Hiro probably misunderstood Tadashi's gasp for one of awe at the sight. In actuality, it had been one of pleasure m Hiro had rubbed right against Tadashi's sensitive head through his jeans and undies, and now the older boy's manhood was reacting in kind, stiffening up.

Tadashi nudged Hiro, making him stand.

"That was pretty cool! But it's time for bed now, otōto, okay?"

Hiro turned to look at him, but Tadashi averted his eyes, well aware of his kid brother's tricks.

"But 'Dassshhhiiii! C'mon, I've gotta have five minutes left, at least."

Tadashi shook his head, arms now crossed in his lap. "Come on, Hiro, look at you, you're freezing! I know I am," he hastily lied.

Hiro stuck out his lip in a pouting gesture but Tadashi still wasn't looking. The older boy picked up the flashlight again and stood, quickly turning away from his brother to adjust himself. Then he turned on the light and held out his hand.

Hiro begrudgingly took it and the boys made their way back to their tent.

Tadashi crawled in after Hiro and found he kept stealing glances now Hiro wasn't trying to win more time before bed from him. Unfortunately his only view was of Hiro's rear in front of him.

Once inside, Tadashi set his flashlight in a corner to light the interior of the small tent, then he zipped closed the door behind them.

Hiro started stripping immediately for bed. He'd never been shy, not like Tadashi was. But until now, Tadashi had never had any trouble changing around Hiro. Sure, usually they had the divider up and couldn't see each other, but they'd done vacations and actually changed together before plenty of times. But Tadashi was having trouble.

He took his time getting his PJ bottoms out of his bag, and taking his shirt off. Still, his erection wouldn't go down! Usually Tadashi would just excuse himself to the restroom and take care of himself if he got a poorly timed boner. But there was nowhere to go. He couldn't venture out in the wilderness at night to find a secluded place to jack off, it was too dangerous with bear and big cats prowling. He was stuck.

By this point, Hiro was already fully nude and rummaging around in his bag for his sleep shorts. Tadashi threw a glance his way again and almost choked. He'd always been respectful before, always made himself not notice when he'd have to change with Hiro. But he couldn't deny he'd always wanted to look. Natural curiosity and all that. And he was just distracted enough with his predicament to let himself look.

Hiro was bent over his admittedly small clothes bag. He was completely nude, with a tiny yet full butt and even a hint of backsack showing. His skin was perfect, not a hair or blemish except for a line of a few freckles across his shoulders, courtesy of a sunburn from one of their last vacations.

Tadashi looked away. It wasn't right to eye his underage little brother like that. But this erection was driving him mad! Making him seethe with horniness. The levels were still low, but slowly they were rising.

Hiro found the pair of pajama shorts he'd been digging for and turned back to his brother. The triumphant grin slid off his face when he saw Tadashi's.

"Bro, you good? You kinda look constipated."

Tadashi blinked, then blushed. "S-sorry! I just got lost in thought."

Hiro shrugged, then stood up so he could put on his bottoms. The top of his head brushed the roof of the tent. As it was, Tadashi had shuffle around on his knees because of how small this second tent was.

Tadashi flushed even deeper with Hiro's cocklet right in his face for a moment while the kid "dressed" (if it's one small item of clothing, is it really getting dressed?)

But Hiro noticed.

"Uhhh… Tadashi? I know you just said you're fine buuutttt…"

Tadashi couldn't take it. He could be a little bad, right? Just this once? Plus, this would just be him being open with his brother. How families should be. Teaching, learning, and freedom from embarrassment.

He gulped.

"Actually, Hiro… well, I don't know if I should say this."

He knew how Hiro worked. The appeal of learning something an adult didn't want him to know was too sweet, and Hiro was far too impulsive to leave the bait alone.

"What is it?" He sat back down, but with his back curved and hands resting on his knees, all attention on his older brother. His little tiny nipples looked like they might be stiff from the chilly night air too! How cute.

Tadashi almost slapped himself. Focus, idiot!

 

"Well… I dunno, you're still a kid, I could get in trouble if Cass ever found out I told you…"

Hiro hated being called a kid! And just as expected, he wrinkled his nose and scowled.

"I'm mature for my age! I'm set to graduate high school early! I promise I'll never tell anyone!"

"Not even your friends? This can't get back to Cass at all?" Tadashi adopted a hushed voice, like he was afraid of being overheard, even though he could hear Cass snoring from the tent across from theirs and knew how deep a sleeper she was.

"What friends?" Hiro asked, dropping his tone to match his Nii-San's. "Look, Tadashi, whatever it is, I promise it's okay. Are you good?"

"Well…" Tadashi picked his words carefully. "You're smart, you probably know you've got puberty coming up?"

Hiro nodded, not sure where this was going.

"Well, I'm still in it. Puberty. And sometimes it makes awkward things happen to me. To talk to you like an adult, my penis gets all hard and it won't go away unless… well, do you know what an orgasm is?"

Hiro nodded. "It's supposed to feel really good, right? And then stuff comes out? Also my thingy does that a lot too, has for a few years, but nothing ever happens. Usually it goes away after a few minutes."

Tadashi nodded. "Right. And that's probably because you still have a year or two left before you start puberty. But once you're in it, like I am, when it goes all stiff like that… it's hard to ignore and it sticks around for way longer. Normally I'd just ignore it or take care of it in private, but…"

Hiro nodded. "You need to get to sleep, and you can't get privacy. I understand, 'Dashi. You can take care of it in here if you want, I'll put in Earbuds and roll over!"

It was going better than Tadashi had dared hope for!

"Are you sure, otōto? I don't want to make things weird."

Hiro shrugged as though he really couldn't care less. "Hey, it's a part of life. And you're my big bro, why would I judge you for it?"

Tadashi gave a warm, genuine smile.

"Then… you can watch if you want. I know you're all ADHD and will probably be dying to anyway."

Hiro immediately dropped the cool exterior. "Oh good, thank you! I was trying to be a good little brother about it but it was killing me already!" He whined.

Tadashi laughed and ruffled his brother's hair, then kicked off his shoes by the door and laid back, already undoing his belt.

"Sweet! And if you want, I could, you know, teach you how to do it? There's a right way and a wrong way, and you're almost at that age anyway. If… if you wanted to lay down with me and try it? We're already closer than most brothers, and I love you, Hiro. I'd hate for you to do it wrong just cuz you didn't know any better, once you get to that age."

This was the tricky part, the pushy part. The part where if this was going to go wrong, it all would here.

But Hiro just smiled and hurried to lay next to Tadashi, who was already on his zipper.

"Okay? Do I need to take these off, then?" Hiro nodded at his shorts.

Tadashi nearly melted. He was so willing!

And the older boy had never been more excited.

Notes:

Originally this was gonna also have a full sex scene, sorry that got cut so I could have time to catch up on the other days. It is very likely that several of these Hidashi Month fics that cut off just before the sex will get second chapter sex scenes once the month is over 💕 so only temporary blue balls